Why Does Ion Life Show the Same Commercial Over and Over Again
"…lithium battery defenseless fire, and exploded…" No, not another one! This is what we say or hear someone else say when at that place's news about withal another bombardment blow. As widely used as lithium-ion battery, it's not uncommon that similar incidents happen every at present and and then. Then in here in this post, we share with yous some of the almost commonly seen root causes to lithium-ion battery blow and their solutions. Hope our post help you lot with what you need.
Symptom 1: Low voltage
If the voltage is below 2V, the internal structure of lithium battery will be damaged, and the battery life will exist affected.
Root cause 1 : High self-belch, which causes low voltage.
Solution : Accuse the blank lithium battery directly using the charger with over-voltage protection, but do non use universal charge. Information technology could be quite unsafe.
Root cause 2 : Uneven current. Due to contact resistance or detection of charge, the current is inconsistent acquired by the uneven charge of the cell. In the short-term storage (12 hours), the voltage difference is very modest, only the voltage difference is large when stored for a long time.
Solution : This low voltage has zip to do with quality issues and can be solved by charging.
Symptom 2: Large internal resistance
Root crusade ane : Detecting equipment differences. If the detection accurateness is not enough or the contact resistance cannot exist eliminated, it will show that the internal resistance is likewise big.
Solution : The internal resistance should be tested by the principle of AC (Alternating Current) bridge method.
Root cause two : As well long storage time. Lithium batteries are stored for too long, resulting in excessive capacity loss, internal passivation, and increased internal resistance.
Solution : It can exist solved by charging and discharging activation.
Root cause three : Abnormal heat. When the battery is processed (spot welding, ultrasonic, etc.), the battery is abnormally heated, causing the thermal closure of the diaphragm and sharply increased internal resistance.
Solution : Manufacturers should pay special attention to welding procedure. The battery should exist carefully tested to control product quality.
Symptom three: Lithium battery expansion
Case i : Lithium battery expands when charging.
When charging lithium battery, information technology will naturally expand, merely mostly not more than 0.1 mm. However, overcharging will cause electrolyte decomposition, increase internal force per unit area, and finally lithium batteries expansion.
Solution : Don't overcharge, especially don't charge for more than 12 hours at a time.
Instance ii : Lithium battery expands when processing.
Mostly, at that place is processing abnormalities (such equally short circuit, overheating, etc.), resulting internal overheating, electrolyte decomposition and battery expansion.
Solution : Manufacturers should strictly control the battery processing procedure and the workshop environment to avoid short excursion and overheating.
Case three : Lithium bombardment expands during circulation.
Every bit the battery circulates, the thickness increases as the number of cycles increases. However, afterward more than fifty weeks, it will non increment whatsoever more. Generally, the normal increase is 0.3 to 0.6 mm.
Solution : This is a normal battery reaction. Increasing the thickness of the casing or reducing the internal textile tin reduce the expansion.
Symptom iv: Battery loss after spot welding
Root cause i : Incorrect spot welding location.
Solution : The right spot welding position should be at the bottom or marked "A" or "-" side. Unmarked sides and large surface tin can't be spot welded.
Root cause ii : As well large spot welding electric current. Some spot-welded nickel strips are poorly fabricated, and then it requires a big current to spot weld, which comes with high temperature, which then causes a short circuit within the battery.
Solution : Using spot-welded nickel strips of good quality is what manufacturers should practise.
Root cause three : Large self-discharge. Partly, the loss is due to the large self-discharge of the battery itself.
Solution : Manufacturers should check electrolyte suitability and assembly issues, while decision-making the grit-costless workshop surround.
Symptom 5: Battery explosion
Root cause 1 : Overcharge
If the protection circuit or the detection chiffonier is out of control, the charging voltage will be greater than 5V, causing the electrolyte decomposition, trigger-happy reaction inside the battery, rapid rising of internal pressure of the bombardment. Eventually the battery explodes.
Root cause 2 : Large ultrasonic energy
When welding the plastic vanquish with ultrasonic, whose free energy is then powerful that information technology melts the inner diaphragm of the battery, the positive and negative electrodes have curt excursion directly, thus with the explosion.
Root cause iii : The battery explodes when welding
Because of the large current, short circuit of the positive and negative electrode happens when spot welding, thus with the explosion.
Do y'all have any other problems? How did y'all piece of work it out? If you have whatever ideas, please contact us or leave a comment. We'd exist very happy to hear from yous.
Source: https://insightsolutionsglobal.com/common-lithium-ion-battery-problems-and-how-to-fix-them/
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